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CN111739480B - Panel uniformity correction method - Google Patents

Panel uniformity correction method Download PDF

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Publication number
CN111739480B
CN111739480B CN202010052560.7A CN202010052560A CN111739480B CN 111739480 B CN111739480 B CN 111739480B CN 202010052560 A CN202010052560 A CN 202010052560A CN 111739480 B CN111739480 B CN 111739480B
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brightness
uniformity
chroma
color
point
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CN111739480A (en
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黄伟星
郑圣耀
戴宇成
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Pegatron Corp
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Pegatron Corp
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2003—Display of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/90—Determination of colour characteristics
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/026—Control of mixing and/or overlay of colours in general
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10024—Color image
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0238—Improving the black level
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/066—Adjustment of display parameters for control of contrast
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

A method for correcting uniformity of a panel. The display panel is set with four color templates, and the original data of the four color templates are measured by an optical instrument. The three primary chroma variations are obtained based on respective raw data of the four color templates. And obtaining a chroma uniformity table based on the three-primary-color chroma change and the color intensity. And (4) obtaining a brightness comparison table by carrying out proportion calculation on the chroma uniformity table. And obtaining a brightness uniformity table based on the chroma uniformity table, the brightness comparison table and the brightness intensity. The display panel adjusts the output signal based on the brightness uniformity table.

Description

Panel uniformity correction method
Technical Field
The present invention relates to a display method of a display panel, and more particularly, to a method for correcting uniformity of a display panel.
Background
The brightness of the display is an important indicator for the viewer to meet the quality requirement, and too bright, too dark, or uneven chroma and brightness may cause visual discomfort to the viewer. Therefore, how to improve the chroma and brightness uniformity of the display has been the research direction in this field. When the conventional uniformity detection and compensation methods are applied to display panels with poor quality, the optical performance of the display panel is not as expected theoretically, so that unexpected results such as color blocks, color spots, etc. may be generated.
Disclosure of Invention
The invention provides a method for correcting the uniformity of a panel, which can reduce the generation of color blocks and color spots.
The panel uniformity correction method of the invention comprises the following steps: shooting the output of a display panel through an optical instrument to obtain a measurement image, and obtaining a plurality of measurement points corresponding to the measurement image; setting a display panel by four color templates respectively, and measuring respective original data of the four color templates respectively by an optical instrument, wherein the four color templates comprise a white template, a red template, a green template and a blue template; comparing the original data of the red sample plate, the green sample plate and the blue sample plate with the original data of the white sample plate respectively to obtain the chroma change of the three primary colors; obtaining a chroma uniformity table based on the three-primary-color chroma change and the color intensity; obtaining a brightness comparison table by calculating the proportion of the chroma uniformity table; obtaining a brightness uniformity table based on the chroma uniformity table, the brightness comparison table and the brightness intensity; and the display panel adjusts the output signal based on the brightness uniformity table.
In an embodiment of the present invention, the step of obtaining the chroma uniformity table based on the chroma variation and the color intensity of the three primary colors includes: calculating a correction value of three primary colors of each measuring point in a manner that the color coordinate of each measuring point on the measuring image approaches the color coordinate of the central point of the measuring image; and calculating a chroma uniformity table based on the color coordinate of each measuring point, the corresponding three primary color correction value, the three primary color chroma change and the color intensity.
In an embodiment of the invention, the three primary color correction value of each measurement point is calculated based on the following formula:
Figure GDA0003185646580000021
wherein,
Figure GDA0003185646580000022
for the color coordinates of each of the measurement points,
Figure GDA0003185646580000023
as a color coordinate of the center point, Δ Ri、ΔGi、ΔBiRepresenting the variation of chroma of three primary colors, RSTEPi、GSTEPi、BSTEPiRepresenting the correction value of three primary colors, i ≧ 1.
In an embodiment of the invention, the chroma uniformity table is calculated based on the following formula:
Figure GDA0003185646580000024
wherein, UTCIs a chroma uniformity table, SCiThe color intensity is, i is not less than 1.
In an embodiment of the invention, the step of obtaining the brightness uniformity table based on the chroma uniformity table, the brightness comparison table and the brightness intensity includes: respectively setting a display panel by using a chroma uniformity table and a brightness comparison table, and respectively measuring respective original data of the chroma uniformity table and the brightness comparison table by using an optical instrument; finding out the brightness value of the darkest point from the original data of the chroma uniformity table as a reference value; calculating the brightness deviation value of each measuring point by utilizing the relation of the chroma uniformity table and the brightness comparison table on the brightness and in a mode that the brightness of each measuring point is close to a reference value; and obtaining a brightness uniformity table based on the chroma uniformity table, the brightness offset value and the brightness intensity.
In an embodiment of the present invention, the luminance offset value of each measurement point is calculated based on the following formula:
Figure GDA0003185646580000025
wherein L isiThe brightness value, L, of each measurement point in the chroma uniformity tableDiFor each measurement point in the brightness comparison table, LminIs a reference value, D is a parameter used for the proportional operation, deltaiFor the luminance offset value of each measurement point, i ≧ 1.
In an embodiment of the invention, the brightness uniformity table is calculated based on the following formula:
UTL＝UTCi×SLi×δi；
wherein, UTLFor brightness uniformity table, UTCIs a chroma uniformity table, SLiThe brightness intensity is, i is not less than 1.
In an embodiment of the invention, the panel uniformity correction method further includes: shooting the output of the display panel through an optical instrument to obtain a measurement image, analyzing the measurement image and further calculating the effective display range of the display panel; and performing initialization setting.
In an embodiment of the present invention, the initialization setting includes: setting color space and backlight parameters.
Based on the above, the invention separately and independently calculates the chroma and the brightness uniformity, and is beneficial to reducing the generation of color blocks and color spots.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a flowchart illustrating a method for correcting uniformity of a panel according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating measurement points obtained after an image captured by an optical instrument is analyzed according to an embodiment of the present invention.
FIG. 3 is a flow chart of setting color intensity according to an embodiment of the invention.
Description of reference numerals:
s105 to S130: method for correcting uniformity of panel
S305 to S330: setting color intensity
Detailed Description
FIG. 1 is a flowchart illustrating a method for correcting uniformity of a panel according to an embodiment of the present invention. In the present embodiment, the display panel is measured by an optical instrument, and the uniformity parameters of the color saturation and the brightness are completed after the color saturation and the brightness of the display panel are analyzed. In addition, in other embodiments, the method may be implemented in combination with another electronic device, that is, an optical instrument measures raw data of the display panel, and then the raw data is transmitted to the electronic device for analysis, so as to obtain uniformity parameters of chroma and brightness.
First, the output of the display panel is captured by the optical instrument to obtain a measurement image, and the measurement image is analyzed to calculate the effective display range of the display panel and perform initialization setting. Such as color space and backlight parameters. The raw data for the four color templates are then generated, measured and processed separately.
Referring to fig. 1, in step S105, the display panel is set by the four color templates, and the raw data (raw data) of each of the four color templates is measured by the optical instrument. The four color templates include a white template Wc, a red template Rc, a green template Gc, and a blue template Bc. Table 1 shows four color samples.
TABLE 1
Ri Gi Bi
WC C C C
RC C-Rgap C C
GC C C-Ggap C
BC C C C-Bgap
Here, the white, red, green, and blue templates Wc, Rc, Gc, and Bc are input signals to be set to the display panel. Ri, Gi and Bi represent the three primary colors (red, green, blue, RGB) of the ith measuring point; wherein i is greater than or equal to 1.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating measurement points obtained after an image captured by an optical instrument is analyzed according to an embodiment of the present invention. After the optical instrument captures the output of the display panel to obtain an image, the optical instrument analyzes the image and initializes the image to i measurement points corresponding to the display panel. Wherein one measurement point is composed of a plurality of pixels. As shown in fig. 2, the measurement points on the display panel are set from left to right and from top to bottom. The measurement point i in the upper left corner is 1 and the measurement point i in the lower right corner is max. Here, max is an integer greater than 1, and is determined based on the effective display range of the display panel.
In Table 1, white sample WCR of each measurement pointi、Gi、BiWill be fixed to the same parameter C. Red sample plate RCThen is fixed Gi、BiR is to beiSet to be a little less than the parameter C (e.g., a comparison value R is less)gap). Green sample plate GCThen is fixed Ri、BiG isiSet to be a little less than the parameter C (e.g., a comparison value G is less)gap). Blue (B)Color sample plate BCThen is fixed Ri、GiA 1 to BiSet to be a little less than the parameter C (e.g., a comparison value B is less)gap). And the four color templates are used for knowing the influence of the three primary colors on the chroma of the display panel respectively.
Specifically, a white sample W is set in the display panelCAnd after the display panel displays the white sample plate, measuring the picture displayed on the display panel through an optical instrument so as to obtain corresponding original data. By analogy, the red template R can be obtainedCGreen sample plate GCAnd blue sample BCThe original data of (1).
Next, in step S110, based on the four color templates (W)C、RC、GC、BC) The respective raw data to obtain the trichromatic chroma variation. For example, compare white samples WCAnd red sample plate RCObtaining Δ R from the raw data of the two, and comparing the white sample plate WCAnd green sample plate GCObtaining Δ G from the raw data of the two, and comparing the white samples WCAnd blue sample BCThe raw data of both to obtain Δ B. The three primary colors are represented by Δ R, Δ G, Δ B. Δ R ═ RC-WC，ΔG＝GC-WC，ΔB＝BC-WC。
In step S115, a chroma uniformity table is obtained based on the three primary color chroma variations (Δ R, Δ G, Δ B) and the color intensities.
Setting a test sample on the display panel, and shooting the test sample by an optical instrument to obtain a measurement image, thereby obtaining the tristimulus value (X) of each measurement point on the measurement imagei、Yi、Zi) Then, the color coordinate (x) of each measuring point is obtained by the tristimulus valuei,yi). Then, the color coordinate (x) of each measuring point on the measuring image is measuredi,yi) Color coordinates (x) approaching the center point of the measurement imagec,yc) The three primary color correction value for each measurement point is calculated. Based on each measuring point on the measuring imageThe color coordinate, the corresponding three primary color correction value, the three primary color chroma change and the color intensity of the color coordinate, and a chroma uniformity table is calculated.
Specifically, the correction value of the three primary colors for each measurement point corresponding to the display panel is calculated based on the following formula (1), thereby making the color coordinate of each measurement point approach the color coordinate of the center point.
Formula (1)
Figure GDA0003185646580000051
Wherein,
Figure GDA0003185646580000052
is the color coordinate of the ith measurement point,
Figure GDA0003185646580000053
as a color coordinate of the center point, Δ Ri、ΔGi、ΔBiRepresenting the trichromatic chroma change, R, of the ith measurement pointSTEPi、GSTEPi、BSTEPiRepresenting the tristimulus correction values for the ith measurement point.
Calculating a correction value R of three primary colors by using a formula (1) to make the color coordinate of each measuring point on the measuring image equal to the color coordinate of the central pointSTEPi、GSTEPi、BSTEPi。
And the chroma uniformity table is calculated based on the following formula (2).
Formula (2)
Figure GDA0003185646580000061
Wherein, UTCIs a chroma uniformity table, SCiThe color intensity of the ith measurement point is (0% -100%).
Chroma uniform table UTCCan be viewed as a summary table that records the chroma coordinates (x) of each measurement point ii,yi). I.e. the colorThe degree uniformity table comprises { (x)1,y1)、(x2,y2)、(x3,y3)、…、(xmax-1,ymax-1)、(xmax,ymax)}。
FIG. 3 is a flow chart of setting color intensity according to an embodiment of the invention. In this embodiment, two modes are provided for the user to select, namely, a standard mode and a proportional mode. Referring to fig. 3, in step S305, i is initialized to 1, i.e. the color intensity is set from the 1 st measurement point. Next, in step S310, mode selection is performed. If the standard mode is selected, go to step S315; if the proportional mode is selected, step S320 is performed. In the standard mode of step S315, the color intensity S is setCiSet as a fixed parameter VCi. In the proportional mode of step S320, different weights W can be set according to the distance from the center pointCiThen, the weight W is weightedCiMultiplying by a fixed parameter VCiTo obtain the color intensity SCi。
Thereafter, in step S325, it is determined whether or not i is smaller than the maximum value (maximum value ═ max). If i is still smaller than the maximum value, the step S310 is returned to after i + 1. If i is equal to the maximum value, which represents that the color intensity setting of all the measurement points is completed, as shown in step S330, the process is ended.
In addition, the setting of the brightness intensity is also the same as the setting of the color intensity shown in FIG. 3, i.e., the color intensity S is setCiModified to a brightness intensity SLiWill fix the parameter VCiChanged to VLiWeight W is addedCiChange to WLi。
Obtaining a chroma uniformity table UT based on formula (2)CAfter that, return to fig. 1. In step S120, the chroma is uniformly listed in UTCObtaining a brightness comparison table W by scaling (e.g., equal scaling)L. Here, since R, G, B common attenuation causes a change in luminance, UT is expressed as a chroma uniformity tableCAnd (5) carrying out proportion calculation. For example, the original i-th measurement point has chroma of alphai、βi、γiAnd multiply it with each otherA parameter D, wherein the parameter D is a value less than 1 and greater than 0. As shown in Table 2, the chroma uniformity table UTCR of the ith measurement pointi、Gi、BiAre each alphai、βi、γiMultiplying the obtained values by the parameters D to obtain a brightness comparison table WL。
TABLE 2
Ri Gi Bi
UTC αi βi γi
WL αi×D βi×D γi×D
Thereafter, in step S125, UT is uniformized based on chromaCBrightness comparison table WLAnd the intensity of the brightness SLiTo obtain a brightness uniformity table UTL。
The display panel is set by the chroma uniformity table and the brightness comparison table, respectivelyThe respective raw data of the chroma uniformity table and the brightness comparison table are measured by an optical instrument. The brightness value of the darkest point is found out from the original data of the chroma uniformity table to be used as a reference value, and the brightness deviation value of each measuring point is calculated in a mode that the brightness of each measuring point is close to the reference value by utilizing the relation of the chroma uniformity table and the brightness comparison table on the brightness. And then, obtaining a brightness uniformity table based on the chroma uniformity table, the brightness deviation value and the brightness intensity. Brightness uniformity meter UTLCan be viewed as a summary table that records the brightness value of each measurement point, including { Lv1,Lv2,Lv3,…,Lvmax-1,Lvmax}。
The luminance offset value of each measurement point is obtained based on the following formula:
Figure GDA0003185646580000071
wherein L isiTo uniform chroma table UTCOf each measurement point, LDiIs a brightness comparison table WLOf each measurement point, LminIs a reference value (i.e., chroma uniformity table UT)CThe brightness value of the darkest spot in the image), D is the parameter used for the scaling operation, deltaiThe luminance offset value for each measurement point.
Brightness uniformity meter UTLThe luminance deviation value is obtained based on the chroma uniformity table, the luminance deviation value and the luminance intensity, and is shown by the following formula:
UTL＝UTCi×SLi×δi,i＝1,…,max；
wherein, UTLFor brightness uniformity table, UTCIs a chroma uniformity table, SLiThe brightness intensity is 0-100%.
Returning to fig. 1, in step S130, the luminance uniformity table is written to the display panel, so that the display panel adjusts the output signal based on the luminance uniformity table.
In conclusion, the invention separately and independently calculates the chroma and the brightness uniformity, and is beneficial to reducing the generation of color blocks and color spots. Furthermore, the intensity parameters (0% -100%) are added to the uniformity of the chroma and the brightness, so that the optical characteristics of the chroma and the brightness can be finely adjusted, and the adjustment according with the expected chroma and the brightness can be generated.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims (5)

1. A panel uniformity correction method, comprising:
shooting the output of a display panel through an optical instrument to obtain a measurement image, and obtaining a plurality of measurement points corresponding to the measurement image;
setting the display panel by four color templates respectively, and measuring respective original data of the four color templates by the optical instrument respectively, wherein the four color templates comprise a white template, a red template, a green template and a blue template;
comparing the original data of the red sample plate, the green sample plate and the blue sample plate with the original data of the white sample plate respectively to obtain the three primary colors chroma change;
based on the three primary colors chroma change and a color intensity, obtaining a chroma uniformity table, comprising:
calculating a correction value of three primary colors of each measuring point in a manner that the color coordinate of each measuring point on the measuring image approaches the color coordinate of a central point of the measuring image; and
the chroma uniformity table is calculated based on the following formula:
Figure FDA0003185646570000011
wherein, UTCThe color uniformity table is used as a table for color uniformity,
Figure FDA0003185646570000012
for the color coordinates of each measuring point, SCiIs the color intensity, Δ R, of the ith measurement pointi、ΔGi、ΔBiRepresenting said variation of the chromaticity of three primary colors, RSTEPi、GSTEPi、BSTEPiRepresenting the correction value of the three primary colors, i is more than or equal to 1;
obtaining a brightness comparison table by performing a ratio calculation on the chroma uniformity table;
based on the chroma uniformity table, the brightness comparison table and a brightness intensity, a brightness uniformity table is obtained, which comprises:
setting the display panel by the chroma uniform table and the brightness comparison table respectively, and measuring respective original data of the chroma uniform table and the brightness comparison table respectively through the optical instrument;
finding out the brightness value of the darkest point from the original data of the chroma uniformity table as a reference value;
calculating a brightness deviation value of each measuring point by utilizing the relation of the chroma uniformity table and the brightness comparison table on brightness and in a mode that the brightness of each measuring point is close to the reference value; and
the brightness uniformity table is calculated based on the following formula:
UTL＝UTCi×SLi×δi；
wherein, UTLFor the brightness uniformity table, UTCIs the chroma uniformity table, SLiI is not less than 1 for the brightness intensity; and
the display panel adjusts an output signal based on the brightness uniformity table.
2. The panel uniformity correction method of claim 1, wherein the three primary color correction value for each measurement point is calculated based on the following formula:
Figure FDA0003185646570000021
wherein,
Figure FDA0003185646570000022
for the color coordinates of each of the measurement points,
Figure FDA0003185646570000023
is the color coordinate of the center point, Δ Ri、ΔGi、ΔBiRepresenting said variation of the chromaticity of three primary colors, RSTEPi、GSTEPi、BSTEPiRepresenting the correction value of three primary colors, i ≧ 1.
3. The panel uniformity correction method of claim 1, wherein the brightness offset value of each measurement point is calculated based on the following formula:
Figure FDA0003185646570000024
wherein L isiThe brightness value, L, of each measurement point in the chroma uniformity tableDiFor each measurement point in the brightness comparison table, LminFor the reference value, D is the parameter used for the calculation of the ratio, δiFor the luminance offset value of each measurement point, i ≧ 1.
4. The panel uniformity correction method of claim 1, further comprising:
shooting the output of the display panel through the optical instrument to obtain a measurement image, analyzing the measurement image and further calculating an effective display range of the display panel; and
an initialization setting is performed.
5. The method of claim 4, wherein the initialization comprises: setting a color space and a backlight parameter.
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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113191988B (en) * 2021-05-31 2023-03-31 浙江大华技术股份有限公司 Brightness correction method and device, storage medium and electronic device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07199882A (en) * 1993-12-28 1995-08-04 Matsushita Electric Ind Co Ltd Chromaticity adjustment circuit
CN1302011A (en) * 1999-12-28 2001-07-04 松下电器产业株式会社 Display device for compensating color nonuniformity of picture elements
CN101267494A (en) * 2007-03-16 2008-09-17 群康科技(深圳)有限公司 Color correction table generation method and compound color measuring separation method for digital video device
CN101521001A (en) * 2008-02-26 2009-09-02 瑞昱半导体股份有限公司 Color correcting method and device of display device
CN101527108B (en) * 2009-04-17 2012-12-12 天津光电星球显示设备有限公司 Measuring method for colorimetric parameters of LED display screen
CN104677906A (en) * 2013-12-03 2015-06-03 名硕电脑(苏州)有限公司 Image information detecting method

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3678000B2 (en) * 1998-05-27 2005-08-03 富士通株式会社 Display device adjustment method and display device adjustment device
EP2273480A3 (en) * 2001-06-11 2012-02-22 Genoa Color Technologies Ltd. Device, system and method for color display
US7327404B2 (en) 2004-10-22 2008-02-05 Mediatek Incorporation Methods and systems for color image processing
JP2006147171A (en) 2004-11-16 2006-06-08 Yokogawa Electric Corp Light source device
US7495679B2 (en) * 2005-08-02 2009-02-24 Kolorific, Inc. Method and system for automatically calibrating a color display
JP5430950B2 (en) * 2008-04-01 2014-03-05 ミツミ電機株式会社 Image display device
US8947476B2 (en) 2010-01-07 2015-02-03 Sharp Kabushiki Kaisha Liquid-crystal display and signal converting circuit
TWI532023B (en) * 2013-10-02 2016-05-01 王紹洋 Color homogenization method for display
TWI540566B (en) * 2014-12-09 2016-07-01 緯創資通股份有限公司 Display and method and system for compensating brightness or color of display
CA2879462A1 (en) * 2015-01-23 2016-07-23 Ignis Innovation Inc. Compensation for color variation in emissive devices
JP6368669B2 (en) * 2015-03-17 2018-08-01 ソニーセミコンダクタソリューションズ株式会社 Display device and correction method
TWI553622B (en) * 2015-05-07 2016-10-11 鈺緯科技開發股份有限公司 Image processing device with image compensation function and image processing method thereof
KR102423350B1 (en) * 2015-08-04 2022-07-22 삼성전자 주식회사 Display apparatus comprising a plularity of module and controll method thereof
CN107134260B (en) * 2017-06-30 2019-05-10 京东方科技集团股份有限公司 A kind of display control method, device and display device
US10339881B1 (en) * 2017-12-28 2019-07-02 Shenzhen China Star Optoelectronics Technology Co., Ltd. Method of acquiring overdrive look-up table of liquid crystal display
CN109243365B (en) * 2018-09-20 2021-03-16 合肥鑫晟光电科技有限公司 Display method of display device and display device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07199882A (en) * 1993-12-28 1995-08-04 Matsushita Electric Ind Co Ltd Chromaticity adjustment circuit
CN1302011A (en) * 1999-12-28 2001-07-04 松下电器产业株式会社 Display device for compensating color nonuniformity of picture elements
CN101267494A (en) * 2007-03-16 2008-09-17 群康科技(深圳)有限公司 Color correction table generation method and compound color measuring separation method for digital video device
CN101521001A (en) * 2008-02-26 2009-09-02 瑞昱半导体股份有限公司 Color correcting method and device of display device
CN101527108B (en) * 2009-04-17 2012-12-12 天津光电星球显示设备有限公司 Measuring method for colorimetric parameters of LED display screen
CN104677906A (en) * 2013-12-03 2015-06-03 名硕电脑(苏州)有限公司 Image information detecting method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
采用三色传感器校正多台计算机显示器色彩效果一致性;何树荣, 栾文魁, 张乐;《光学技术》;20030131;第29卷(第1期);第17-20页 *
颜色校正方法及其在图像处理中的应用;徐晓昭, 沈兰荪, 刘长江;《计算机应用研究》;20080831;第25卷(第8期);第2250-2254页 *

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